More Images of GRB991216
1
ACIS X-ray Spectrum
This image illustrates the X-ray afterglow spectrum of
GRB991216 obtained with the Advanced CCD Imaging
Spectrometer (ACIS) instrument aboard the Chandra X-ray
Observatory on December 18, 1999. The ACIS instrument
is an array of charged coupled devices (CCDs). This
instrument is especially useful because it can make
X-ray images, and at the same time, measure the energy
of each incoming X-ray, as depicted in this
image.
(Credit: NASA/CNR/L.Piro et
al)
2
Optical image of field around
GRB991216
This image is an optical view of the area around
GRB991216. The optical transient believed to be the GRB
afterglow is indicated with an arrow.
(Credit: S.Jha et al.
(Harvard-Smithsonian Center for Astrophysics))
3
Chandra HETG Spectrum
Shown here is the X-ray afterglow spectrum of
GRB991216 obtained with Chandra's High Energy Grating
Spectrometer (HETG). The HETG is one of two instruments
aboard Chandra (the other being the Low Energy Grating
Spectrometer) dedicated to high-resolution spectroscopy
and can be used in conjunction with the ACIS or High
Resolution Camera.
(Credit: NASA/CNR/L.Piro et
al)
4
X-ray image of GRB991216
Taken with the ACIS instrument, this CCD image shows
the observed X-ray afterglow.
(Credit: NASA/CXC/Piro et
al.)
5
Chandra X-ray Image with Scale
Bar
Scale bar = 10 arcsec
(Credit: NASA/CNR/L.Piro et
al.)
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GRB991216 (03 Nov 00)